drm/amdgpu: Bypass GMC/UVD/VCE hw_fini in SR-IOV

On vega10, some hw finish operations should not be applied in SR-IOV
case. This works as workaround to fix multi-VFs reboot/shutdown
issues.
Signed-off-by: Trigger Huang <trigger.huang@amd.com>
Reviewed-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -781,6 +781,12 @@ static int gmc_v9_0_hw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+	if (amdgpu_sriov_vf(adev)) {
+		/* full access mode, so don't touch any GMC register */
+		DRM_DEBUG("For SRIOV client, shouldn't do anything.\n");
+		return 0;
+	}
+
 	amdgpu_irq_put(adev, &adev->mc.vm_fault, 0);
 	gmc_v9_0_gart_disable(adev);
 

drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c

@@ -562,7 +562,13 @@ static int uvd_v7_0_hw_fini(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	struct amdgpu_ring *ring = &adev->uvd.ring;
 
+	if (!amdgpu_sriov_vf(adev))
 		uvd_v7_0_stop(adev);
+	else {
+		/* full access mode, so don't touch any UVD register */
+		DRM_DEBUG("For SRIOV client, shouldn't do anything.\n");
+	}
+
 	ring->ready = false;
 
 	return 0;

drivers/gpu/drm/amd/amdgpu/vce_v4_0.c

@@ -505,8 +505,14 @@ static int vce_v4_0_hw_fini(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	int i;
 
+	if (!amdgpu_sriov_vf(adev)) {
 		/* vce_v4_0_wait_for_idle(handle); */
 		vce_v4_0_stop(adev);
+	} else {
+		/* full access mode, so don't touch any VCE register */
+		DRM_DEBUG("For SRIOV client, shouldn't do anything.\n");
+	}
+
 	for (i = 0; i < adev->vce.num_rings; i++)
 		adev->vce.ring[i].ready = false;